<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/wellcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card >
        <!-- 警告信息提示区域 -->
        <el-alert title="添加商品信息！" type="info" 
         :closable="false" show-icon center="">
        </el-alert>

        <!-- 步骤条 -->
        <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
            <el-step title="基本信息"></el-step>
            <el-step title="商品参数"></el-step>
            <el-step title="商品属性"></el-step>
            <el-step title="商品图片"></el-step>
            <el-step title="商品内容"></el-step>
            <el-step title="完成"></el-step>
        </el-steps>

        <!-- 表单区域 -->
        <el-form :model="addForm" :rules="addRules" ref="addFormRef" label-width="100px" label-position="top" class="demo-dynamic">
          <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeLeaveTab"
          @tab-click="tabClick">
            <el-tab-pane label="基本信息" name="0">
              <el-form-item label="商品名称" prop="goods_name">
                <el-input v-model="addForm.goods_name"></el-input>
              </el-form-item>
              <el-form-item label="商品价格" prop="goods_price">
                <el-input v-model="addForm.goods_price" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品重量" prop="goods_weight">
                <el-input v-model="addForm.goods_weight" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品数量" prop="goods_number">
                <el-input v-model="addForm.goods_number" type="number"></el-input>
              </el-form-item>
              <el-form-item label="商品分类" prop="goods_cat">
                <!-- 级联选择框 -->
                <el-cascader expandTrigger='hover' clearable
                  v-model="addForm.goods_cat"
                  :options="cateList"
                  :props="cateProps"
                  @change="selectChange">
                </el-cascader>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品参数" name="1">
              <el-form-item :label="item.attr_name" v-for=" item in manyData"
              :key="item.attr_name">
                <el-checkbox-group v-model="item.attr_vals">
                  <el-checkbox :label="m" v-for="(m,i) in item.attr_vals" :key="i" border></el-checkbox>
                </el-checkbox-group>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品属性" name="2">
              <el-form-item :label="item.attr_name" v-for="item in onlyData" :key="item.attr_id">
                <el-input v-model="item.attr_vals"></el-input>
              </el-form-item>
            </el-tab-pane>
            <el-tab-pane label="商品图片" name="3">
              <el-upload class="upload-demo"
                :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove"
                list-type="picture" :headers="headersObj" :on-success="uploadSuccess">
                <el-button size="small" type="primary">点击上传</el-button>
                <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
              </el-upload>
            </el-tab-pane>
            <el-tab-pane label="商品内容" name="4">
              <quill-editor v-model="addForm.goods_introduce">
              </quill-editor>
              <el-button type="primary" @click="add()">添加商品</el-button>
            </el-tab-pane>
          </el-tabs>
        </el-form>
    </el-card>

    <!-- 图片预览弹出框 -->
    <el-dialog append-to-body
      title="图片预览"
      :visible.sync="dialogVisible"
      width="50%">
      <img :src="previewUrl" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
export default {
    name:'Add',
    data(){
        return {
            activeIndex:'0',
            addForm:{
              goods_name:'',
              goods_price:0,
              goods_weight:0,
              goods_number:0,
              goods_cat:[],
              pics:[],
              goods_introduce:'',
              attrs:[]
            },
            addRules:{
              goods_name: [
                { required: true, message: '请输入商品名称', trigger: 'blur' }
              ],
              goods_price: [
                { required: true, message: '请输入商品价格', trigger: 'blur' }
              ],
              goods_weight: [
                { required: true, message: '请输入商品重量', trigger: 'blur' }
              ],
              goods_number: [
                { required: true, message: '请输入商品数量', trigger: 'blur' }
              ],
              goods_cat: [
                { required: true, message: '请选择商品分类', trigger: 'blur' }
              ]
            },
            cateList:[],
            cateProps:{
              value:'cat_id',
              label:'cat_name',
              children:'children'
            },
            manyData:[],
            onlyData:[],
            uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
            headersObj:{
              Authorization:window.sessionStorage.getItem('token')
            },
            previewUrl:'',
            dialogVisible:false,
        }
    },
    created(){
      this.getCateList();
    },
    methods:{
      // 获取分类列表数据
      async getCateList(){
        const {data:res} = await this.axios.get('categories');
        if(res.meta.status !==200){
          return this.$message.error('获取商品分类失败了~');
        }
        this.cateList = res.data;
      },
      // 级联选择框发送变化
      selectChange(){
        if(this.addForm.goods_cat.length !== 3){
          this.addForm.goods_cat = []
        }
      },
      // 标签页切换事件
      beforeLeaveTab(_, oldActiveName){
        if(oldActiveName === '0' && this.addForm.goods_cat.length !== 3){
          this.$message.error('请先将基本信息填写完全!');
          return false;
        }
      },
      // 点击商品参数tab时触发
      async tabClick(){
        if(this.activeIndex === '1'){
          const {data:res} = await this.axios.get(`categories/${this.cateId}/attributes`,
            {params:{sel:'many'}});
          if(res.meta.status !==200){
            return this.$message.error('获取商品动态参数失败了~');
          }
          res.data.forEach(item =>{
            item.attr_vals = item.attr_vals.length === 0?[]:item.attr_vals.split(' ')
          })
          this.manyData = res.data;
        }else if(this.activeIndex === '2'){
          const {data:res} = await this.axios.get(`categories/${this.cateId}/attributes`,
            {params:{sel:'only'}});
          if(res.meta.status !==200){
            return this.$message.error('获取商品静态属性失败了~');
          }
          this.onlyData = res.data;
          // console.log(this.onlyData);
        }
      },
      // 处理图片预览
      handlePreview(file){
        // console.log(file);
        this.previewUrl = file.response.data.url;
        this.dialogVisible = true;
      },
      // 处理图片删除
      handleRemove(file){
        const filePath = file.response.data.tmp_path;
        const index = this.addForm.pics.findIndex( p =>{ p.pic === filePath})
        this.addForm.pics.splice(index,1);
        console.log(this.addForm.pics);
      },
      // 文件上传成功
      uploadSuccess(response){
        // console.log(response);
        const picInfo = {pic:response.data.tmp_path};
        this.addForm.pics.push(picInfo);
        // console.log(this.addForm);
      },
      // 添加商品
      add(){
        this.$refs.addFormRef.validate(async valid =>{
          if(!valid) this.$message.error('请填写必要的表担项');
          
          // 处理动态参数
          this.manyData.forEach(item =>{
            const newInfo = {attr_id:item.attr_id, attr_value:item.attr_vals.join(' ')};
            this.addForm.attrs.push(newInfo)
          })
          // 处理静态属性
          this.onlyData.forEach(item =>{
            const newInfo = {attr_id:item.attr_id, attr_value:item.attr_vals.join(' ')};
            this.addForm.attrs.push(newInfo)
          })

          const form = JSON.parse(JSON.stringify(this.addForm))
          form.goods_cat = form.goods_cat.join(',');
          // console.log(form);

          // 发送添加请求
          const {data:res} = await this.axios.post('goods',form);
          if(res.meta.status !==201){
            return this.$message.error('添加商品失败了~');
          }
          this.$message.success('添加商品成功了~');
          this.$router.push('/goods')
        })
      }
    },
    computed:{
      cateId(){
        if(this.addForm.goods_cat.length === 3){
          return this.addForm.goods_cat[2];
        }
        return null;
      }
    }
}
</script>

<style lang="less" scoped>
.el-checkbox{
  margin: 0 10px 0 0 !important; 
}
.previewImg{
  width: 100%;
}
.el-button{
  margin: 10px 0;
}
</style>